Heat stress evaluation at the working face in hot coal mines using an improved thermos physiological model

2017 ◽  
Vol 35 (1) ◽  
pp. 67-74
Author(s):  
Jiansong Wu ◽  
Ming Fu ◽  
Xing Tong ◽  
Yueping Qin
Keyword(s):  
Heat Stress ◽  
Coal Mines ◽  
Physiological Model ◽  
Stress Evaluation ◽  
Working Face

scholarly journals The Stability of Gob-Side Entry Retaining in a High-Gas-Risk Mine

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Junwen Zhang ◽  
Yulin Li
Keyword(s):  
Coal Mines ◽  
Surrounding Rock ◽  
Shanxi Province ◽  
Engineering Practice ◽  
Efficient Production ◽  
Coal Recovery ◽  
Working Face ◽  
Geological Conditions ◽  
The Stability ◽  
Strengthening Technique

There are series of problems faced by most of the coal mines in China, ranging from low-coal recovery rate and strained replacement of working faces to gas accumulation in the upper corner of coalfaces. Based on the gob-side entry retaining at the No. 18205 working face in a coal mine in Shanxi Province, theoretical analysis, numerical simulation, and engineering practice were comprehensively used to study the mechanical characteristics of the influence of the width of the filling body beside the roadway and the stability of surrounding rock in a high-gas-risk mine. The rational width of the filling body beside the roadway was determined, and a concrete roadway-side support with a headed reinforcement-integrated strengthening technique was proposed, which have been applied in engineering practice. The stability of the filling body beside the roadway is mainly influenced by the movement of the overlying rock strata, and the stability of the surrounding rock can be improved effectively by rationally determining the width of the filling body beside the roadway. When the width of the roadway-side filling body is 2.5 m, the surrounding rock convergence of the gob-side entry retaining is relatively small at only 5% of the convergence ratio. It has been shown that the figure for roof separation is relatively low, and strata behaviors are relatively alleviated and gas density do not exceed the limit, which are the best results of gob-side entry retaining. The results of this research can provide theoretical guidance for excavation of coal mines with similar geological conditions and have some referential significance to safety and efficient production in coal mines.

A Fast Geological Logging Technique of Underground Coal Mines Based on Photogrammetry

2013 ◽  
Vol 663 ◽  
pp. 661-667 ◽  
Author(s):  
Hao Li ◽  
Yun Cai ◽  
Biao Yang ◽  
Ming Fei Wu
Keyword(s):  
Image Processing ◽  
Information System ◽  
Information Processing ◽  
Coal Mines ◽  
Digital Camera ◽  
Work Efficiency ◽  
Fast Acquisition ◽  
Working Face ◽  
Underground Coal Mines ◽  
Computer Aided

Aiming at the deficiency of current geological logging method on the coal working face, the geological logging information system for coal mines based on digital camera is developed, integrating techniques of photogrammetry, graphic and image processing, and GIS. Emphasis is mainly placed on the fast acquisition of images from coal mining and excavation faces, photographic information processing and geological logging method, thus achieving the integrated work pattern of data acquisition, computer-aided processing and logging mapping. The experiment shows that by applying the fast geological logging technique of coal mines, the logging result which is accurate, authentic, reliable and satisfies the current requirements can be obtained, improving the work efficiency and result quality, therefore providing a new means and approach for geological logging of underground coal mines.

199. Heat Stress Evaluation and Worker Fatigue in a Steel Plant

2001 ◽  
Author(s):  
M. Chen ◽  
I. Mao ◽  
C. Chen ◽  
W. Yeh
Keyword(s):  
Heat Stress ◽  
Steel Plant ◽  
Stress Evaluation

Critical heat stress evaluation of clothing ensembles with different levels of porosity

Ergonomics ◽  
2010 ◽  
Vol 53 (8) ◽  
pp. 1048-1058 ◽  
Author(s):  
T. Bernard ◽  
C. Ashley ◽  
J. Trentacosta ◽  
V. Kapur ◽  
S. Tew
Keyword(s):  
Heat Stress ◽  
Stress Evaluation ◽  
Different Levels
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